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Title: Grain neighbour effects on twin transmission in hexagonal close-packed materials

Abstract

Materials with a hexagonal close-packed (hcp) crystal structure such as Mg, Ti and Zr are being used in the transportation, aerospace and nuclear industry, respectively. Material strength and formability are critical qualities for shaping these materials into parts and a pervasive deformation mechanism that significantly affects their formability is deformation twinning. The interaction between grain boundaries and twins has an important influence on the deformation behaviour and fracture of hcp metals. Here, statistical analysis of large data sets reveals that whether twins transmit across grain boundaries depends not only on crystallography but also strongly on the anisotropy in crystallographic slip. As a result, we show that increases in crystal plastic anisotropy enhance the probability of twin transmission by comparing the relative ease of twin transmission in hcp materials such as Mg, Zr and Ti.

Authors:
 [1];  [1];  [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC). Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1340967
Report Number(s):
LA-UR-16-22936
Journal ID: ISSN 2041-1723
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 7; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Arul Kumar, Mariyappan, Beyerlein, Irene Jane, McCabe, Rodney James, and Tome, Carlos N. Grain neighbour effects on twin transmission in hexagonal close-packed materials. United States: N. p., 2016. Web. doi:10.1038/ncomms13826.
Arul Kumar, Mariyappan, Beyerlein, Irene Jane, McCabe, Rodney James, & Tome, Carlos N. Grain neighbour effects on twin transmission in hexagonal close-packed materials. United States. doi:10.1038/ncomms13826.
Arul Kumar, Mariyappan, Beyerlein, Irene Jane, McCabe, Rodney James, and Tome, Carlos N. Mon . "Grain neighbour effects on twin transmission in hexagonal close-packed materials". United States. doi:10.1038/ncomms13826. https://www.osti.gov/servlets/purl/1340967.
@article{osti_1340967,
title = {Grain neighbour effects on twin transmission in hexagonal close-packed materials},
author = {Arul Kumar, Mariyappan and Beyerlein, Irene Jane and McCabe, Rodney James and Tome, Carlos N.},
abstractNote = {Materials with a hexagonal close-packed (hcp) crystal structure such as Mg, Ti and Zr are being used in the transportation, aerospace and nuclear industry, respectively. Material strength and formability are critical qualities for shaping these materials into parts and a pervasive deformation mechanism that significantly affects their formability is deformation twinning. The interaction between grain boundaries and twins has an important influence on the deformation behaviour and fracture of hcp metals. Here, statistical analysis of large data sets reveals that whether twins transmit across grain boundaries depends not only on crystallography but also strongly on the anisotropy in crystallographic slip. As a result, we show that increases in crystal plastic anisotropy enhance the probability of twin transmission by comparing the relative ease of twin transmission in hcp materials such as Mg, Zr and Ti.},
doi = {10.1038/ncomms13826},
journal = {Nature Communications},
number = ,
volume = 7,
place = {United States},
year = {2016},
month = {12}
}

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    Works referencing / citing this record:

    Interface structures and twinning mechanisms of twins in hexagonal metals
    journal, June 2017